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Star Valley Drinking Water

Site Contact:
Martin McComb
On-Scene Coordinator


Site Location:
Chaparro Lane
Grover, WY 83122
NRC#: 1343593

On August 5, 2022, EPA received a report from the National Response Center (NRC) regarding an incident at the Star Valley Trailer Court, north of Grover, Wyoming. The NRC report stated an individual who lives at the trailer court deliberately injected an unknown oily substance into the drinking water distribution system.  The trailer court gets its drinking water from an artesian groundwater well and has approximately 32 connections, serving a population of roughly 72 persons.  The well was not contaminated but six homes are known to have been impacted.  The drinking water owner/operator shut down the system, notified all residents and quickly installed two valves to isolate the contaminated homes.

EPA has primary authority to enforce the public water supply protection program in Wyoming and issued the system operator an order detailing the steps required to bring the system back online. EPA dispatched an emergency response team to assist the system operator with flushing the distribution system and taking water samples.

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